Script Not Working in Other Browser except IE

I wrote a simple code in javascript and it is working fine with IE but when I open the page in FireFox or in Google Crome it is not working as I expect. Actually I am enabling and disabling the combo box on the on change event of radio button.

Hi, there are a few things wrong with your code, it seems like you dont understand the difference between a name and an id. An id is unique, a name is not. You can not retrieve a name with getElementById(). The following code will work in all browsers: